EP3202364B1 - Chambre à poudre, station pour une chambre à poudre et procédé pour faire fonctionner un dispositif de polissage de poudre - Google Patents

Chambre à poudre, station pour une chambre à poudre et procédé pour faire fonctionner un dispositif de polissage de poudre Download PDF

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Publication number
EP3202364B1
EP3202364B1 EP16154213.9A EP16154213A EP3202364B1 EP 3202364 B1 EP3202364 B1 EP 3202364B1 EP 16154213 A EP16154213 A EP 16154213A EP 3202364 B1 EP3202364 B1 EP 3202364B1
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EP
European Patent Office
Prior art keywords
powder
powder chamber
functional
polishing device
designed
Prior art date
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Application number
EP16154213.9A
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German (de)
English (en)
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EP3202364A1 (fr
Inventor
Etienne Lebreton
Florent Jean-Claude Georges Beani
Tiago Bertolote
Marcel Donnet
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Ferton Holding SA
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Ferton Holding SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to EP16154213.9A priority Critical patent/EP3202364B1/fr
Application filed by Ferton Holding SA filed Critical Ferton Holding SA
Priority to CN201780019348.7A priority patent/CN108882972B/zh
Priority to US16/075,413 priority patent/US11633258B2/en
Priority to ES17702393T priority patent/ES2881923T3/es
Priority to JP2018540868A priority patent/JP6946310B2/ja
Priority to PCT/EP2017/052331 priority patent/WO2017134195A1/fr
Priority to EP17702393.4A priority patent/EP3410977B1/fr
Publication of EP3202364A1 publication Critical patent/EP3202364A1/fr
Application granted granted Critical
Publication of EP3202364B1 publication Critical patent/EP3202364B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00—Dental tools or instruments
    • A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
    • A61C3/025—Instruments acting like a sandblast machine, e.g. for cleaning, polishing or cutting teeth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/06—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other movable; portable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0069—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with means for preventing clogging of the equipment or for preventing abrasive entering the airway
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass

Definitions

  • the present invention relates to a powder polishing device.
  • Powder polishing devices of the kind discussed here are used in professional dental hygiene, using a mixture of powder and air to clean dental surfaces.
  • the necessary powder is made available either in the powder polishing device itself or in externally arranged powder chambers.
  • EP 0 097 288 B1 discloses a powder polishing device with a powder container into which a compressed gas is introduced, such that the powder located there is swirled and can be removed as a mixture of powder and air via an outlet opening.
  • the powder container is inside the powder polishing device and can always be refilled with powder from above.
  • these systems in which the powder is filled directly into the powder polishing device are not flexible, especially when a change is required between different kinds of powder.
  • EP 0 143 617 A2 discloses a hand-held dental cleansing system for delivery of an abrasive stream against an object which is to be cleaned, e.g. a tooth.
  • the system is adapted to be coupled to sources of pressurized liquid and gas, and includes handpiece having a canister containing the abrasive material.
  • US 2 825 135 A discloses a chamber being screwed on a basis station.
  • US 2005 250070 A1 refers to an orientation independent apparatus for applying a uniform coating of a dental powder as well as a method of operating the orientation independent apparatus.
  • the apparatus can be used in the preparation of a replica tooth during restorative dental work.
  • US 2 696 049 shows a chamber being connected to a basis station via a bolt and a screw mechanism.
  • JP H11 104149 discloses a dental sandblast having a hand-piece main body, a powder container, a first compressed air supply pipe, a mixing room, a second compressed air supply pipe and a shutting valve to shut the first compressed air supply pipe.
  • a shutting valve When the shutting valve is closed, only compressed air will be supplied to the mixing room to blow away the powder in the spray pipe, so that the spray pipe is cleaned.
  • US 2008 233540 A1 discloses a powder blast tool for mixing a powder with a pressurised gas, having at least one powder reservoir, with supply lines for the pressurised gas, and a discharge line, which is connected to a discharge nozzle, at which a powder-gas mixture and optionally pressurised water are discharged, wherein the powder blast tool can preferably be connected to plural powder reservoirs simultaneously and exchangeably, wherein at least one receiving region with at least one mixture terminal and at least one gas terminal is disposed on the powder blast tool and wherein the powder reservoir has a coupling region for exchangeable connection of the powder reservoir to the powder blast tool.
  • US 5 199 229 A discloses a hand-held sand blasting device, which is particularly useful for treatingmall surface areas, such as tooth faces in situ, includes a sand cartridge adapted to be placed in a handle portion of the device and rewardly sealed by a piston, which is adapted to be advanced by pressurized air.
  • hand-held dental cleansing system for delivery of an abrasive laden stream against an object which is to be cleaned, e.g. a tooth.
  • the system is adapted to be coupled to sources of pressurized liquid and gas, and includes handpiece 24 having a canister 36 containing the abrasive material.
  • the chambers arranged externally such as those disclosed in US 7,980,923 B2 or DE 10 2012 109 797 B , which are based on developments by this applicant, show advantages in this respect, but do not contain any safety arrangements and therefore can also be opened while under pressure.
  • the connecting sector or the connector with which the powder chamber is connected to the powder polishing device is elaborately designed since it has to include not only the locking means of the powder chamber, but also a drain to remove the mixture of powder and air.
  • there is often contamination in the area of these connectors which means that the powder chamber can sometimes only be replaced, for example after being refilled, after elaborate cleaning. This prevents quick and effective operation.
  • the attachment of the powder chamber requires skill, since the contact matrix must be exactly "hit".
  • a powder chamber in particular for powder polishing devices used in dental hygiene, comprises a casing and two functional sectors whereby the two functional sectors are substantially arranged to be opposite to each other, whereby at least one functional sector is designed to provide an opening for a working medium such as air, in particular compressed air, or a mixture of powder and air, and whereby the two functional sectors are designed to allow the powder chamber to be locked.
  • the two functional sectors are preferably arranged along an axis and are rotationally symmetric.
  • the powder chambers known from the nearest state of the art as a rule have only one functional sector which must provide the locking function as well as the feeding and removal function of the working media
  • the above mentioned powder chamber has the advantage of two functional sectors, thus separating the two functions if necessary.
  • the fact that the two functional sectors are also arranged to be opposite to each other has the effect that the powder chamber can be locked and sealed by jamming, compressing or otherwise manipulating it, in particular by means of a force/pressure build-up.
  • the force necessary for that, especially the closing force, which advantageously acts along the powder chamber, in particular in longitudinal direction of the powder chamber is in a range of about 5 to 800 N in a variety of embodiments.
  • an insert/powder container such as a substantially funnel-shaped insert
  • the insert can also be designed as a "double funnel", beginning with a first funnel-shaped section, followed by a cylindrical section, followed by another funnel-shaped section. This configuration very effectively prevents plugging or blocking of the powder.
  • a venturi nozzle is provided in the powder chamber which serves to mix or produce the mixture of powder and air.
  • the casing and the insert are made of a plastic material.
  • this is a transparent plastic which allows the monitoring of the powder's filling level.
  • the casing is also transparent or at least partly transparent. Furthermore, the transparency allows the operator to recognize powders of different colours, which for example correspond to the different taste varieties or grain sizes of the powders. Suitable powders are: Sodium hydrogen carbonate, Calcium carbonate, Erythritol and/or Glycine, preferably with an average particle size between 10 and 150 ⁇ m.
  • the casing is of a rotationally symmetric shape, i.e. in particular cylindrical, for example with a diameter of about 5 to 15 cm.
  • the cylindrical powder chamber is arranged upright on corresponding powder polishing device.
  • the station can contain the operating means, displays, electrical and mechanical connections such as for a hand-held device.
  • a first functional sector is a bottom plate form and force-fittingly connected with the casing, especially such that it can be connected and disconnected.
  • the first functional sector or the bottom plate are suitably (also) made of a plastic material, which is a particular advantage in terms of cost and allows for a wide range of design in a simple manner.
  • the attachment in or on the casing can be on its inside and/or outside, for example by means of an appropriate thread.
  • the access into the casing is provided through which, for example, the said insert and/or the said venturi nozzle can be arranged in the powder chamber.
  • the access has the same cross section as the casing. In other words, the complete "bottom" of the powder chamber is designed so it can be detached.
  • a second functional sector is designed as an - especially detachable - closure element which is form and force-fittingly arranged on or attached to, in particular pinned to the casing.
  • the casing is tapered in the area of the closure element, virtually forming a type of bottleneck. If the closure element is not attached, access is also provided, in particular a round or circular access into the powder chamber with a diameter of about 20 to 45 mm, in particular of about 25 to 35 cm. Via this "neck" or this smaller cross section, access is also provided into the powder chamber, through which powder can be refilled quickly and simply. It should be mentioned that the powder chamber does not have to have a tapering cross section in the upper area. There, the positive or nonpositive connection can also be established, for example, by a thread.
  • the second functional sector is opposite the first functional sector.
  • a lower (first) functional sector and an upper (second) functional sector could also be left and right functional sectors, since the kind of locking does not depend on the position in space but the position of the two functional sectors in relation to each other, whereby these must be designed such that in casing of force application along or parallel to an axis connecting the two functional sectors, for example the rotational axis of the powder chamber, it becomes possible for the powder chamber to be braced, jammed, etc.
  • force application can be in the direction from the first to the second functional sector and/or the other way round.
  • the two functional sectors are provided with pressure surfaces or force application surfaces on the outside and substantially extending across the rotational axis, which are designed to affect pressure or a force upon the powder chamber, whereby these surfaces are round, in particular circular and/or also ringshaped, and whereby these are suitably level or substantially smooth.
  • Typical sizes of the areas for applying pressure/force are in the range of about 5 to 15cm.
  • the second functional sector is designed as a plug that can be inserted in the casing, whereby the plug is formed cylindrically or at least in sections as a cone or truncated cone.
  • a closing element or such a plug can preferably be inserted and removed without rotation and is sufficient to reliably close the casing for storing and handling purpose.
  • a substantially smooth sealing surface is achieved which, to stay with the example of the rotationally symmetrical casing, is slanted toward the rotational axis or may also extend parallel.
  • the plug can be designed offset, having areas of different diameters, which also allows sealing surfaces extending substantially vertical to the rotational axis.
  • the plug can be manipulated with one hand, allowing that closure element to be plugged in as well as removed with one hand. While usually two hands are necessary for a threaded connection, the said plug can be attached, for example, by easily pushing it in and out with the thumb, thus allowing one-handed manipulation.
  • sealing elements in the form of O rings are provided in suitable places in addition to the design/form of the sealing areas.
  • the casing and the first functional sector or the bottom plate can also be made in one piece, but then the other access has to be designed such that it is possible to arrange the inlet or the venturi nozzle.
  • the powder chamber is designed such that locking it causes the powder chamber to be pressure sealed, in particular when locking it is provided by force application along an axis from one functional sector to the other, in particular for example along the rotational axis, whereby the force is, for example, in a range of about 5 to 800 N, depending on the various embodiments.
  • the closure element is arranged by a user in or on the casing, thereby closing and sealing the chamber, but that this arrangement may not yet pressure seal the casing/powder chamber.
  • the actual pressure sealing is affected only by locking the powder chamber, for example with a corresponding arrangement/station which jams or braces the powder chamber or the casing and the functional sectors.
  • the two functional sectors are arranged substantially opposite to each other, allowing the bracing or jamming of the powder chamber along an axis extending between the two functional sectors.
  • the force is applied via the two already mentioned force application areas/pressure surfaces of the functional sectors.
  • sealants/seals such as O rings, etc. can be used to enhance the sealing function against pressure loss.
  • the locking means also (tightly) couples the connections for the supply/removal media, i.e. especially the inlet/outlet in the functional sectors.
  • the powder chamber as such can also be arranged "tightly" in the station, such that in fact the functional sectors only have a locking function. This can be done via an appropriate positive or nonpositive connection such as a screw connection through which the functional sectors(s) are arranged in the powder chamber.
  • the powder chamber is designed/built for a pressure load of about 2.0 to 5.5 bar.
  • a minimum pressure is in the range of about 1 bar, while a maximum pressure is in a range of about 10 bar.
  • the first functional sector comprises an opening designed as an inlet for a medium, in particular (compressed) air.
  • the second functional sector comprises an opening designed as an outlet for a medium, in particular air or a mixture of powder and air.
  • air is provided from below while the mixture of powder and air is removed via the second upper functional sector.
  • powder or the like collects in the lower functional sector which could contaminate the functional sector.
  • the described arrangement can also be designed exactly the opposite way, such that the compressed air is taken in at the top and the mixture of powder and air is removed at the bottom.
  • the input as well as the outlet can also be arranged in a functional sector.
  • the outlet in the closure element is designed such that the outlet is formed laterally in the closure element, for example by means of a substantially horizontal drill hole which, according to one embodiment merges into a vertical drill hole, finally leading the mixture of powder and air outside.
  • the initially horizontal drill hole has the advantage that the outlet is not in the main stream direction which substantially extends along the venturi nozzle. This geometry or this path is not only relatively easy to produce (only two simple drill holes) but can also be extended or adapted at will.
  • the powder chamber is formed rotationally symmetrical, with the openings in the functional sectors suitably lying on the rotational axis.
  • This in particular facilitates the handling of the powder chamber, since when positioning the powder chamber at a station or a powder polishing device, the operator does not have to watch whether for example a special angle has to be maintained relative to the station.
  • a functional sector has two openings, these can be arranged rotationally symmetrical, for example when one surrounds the other annularly.
  • the functional sectors can be provided with several connections or openings, and as a matter of principle these should be, at least preferably, of rotationally symmetrical design and arrangement.
  • At least one functional sector comprises a recess/depression which can prevent a lateral displacement of the powder chamber, in particular via corresponding lateral surfaces.
  • the recess/depression is formed in such a way that a correspondingly congruent counterpart on a station engages in this recess/depression according to the present invention, allowing the powder chamber to be securely fastened or held, especially also across the rotational axis.
  • the functional sector has a concave recess/curvature.
  • a centrally positioned depression advantageously allows the centering of the powder chamber.
  • at least one functional sector can also be provided with at least one projection or for example a convex projection/process or a corresponding curvature, whereby the above description for the recess/depression applies analogously and correspondingly.
  • one of the said openings for the working medium is arranged centrally in the area of the recess/depression (or process/projection) of a functional sector. Annularly to it and offset along the rotational axis is the actual pressure surface used to lock/prestress the powder chamber. Therefore, a kind of cascading or functional separation is provided, and of course a force must/can be exerted in the area of the recess/depression to seal the openings/accesses in a suitable manner.
  • a sealing element such as an O ring is arranged here as well.
  • the powder chamber is magnetic at least in part, especially around the circumference, or has a magnetic area or section. This allows an at least partly surrounding magnetic ring to be fastened to the casing. This ring can be pasted to the seal or can be braced via the first functional sector or via the bottom plate.
  • the invention also related to a station, in particular for powder polishing devices, whereby the station is provided with two substantially opposite connecting sections, especially one lower and one upper connecting section, whereby the connecting sections are designed to hold positively or nonpositively or arrange a powder chamber, in particular a powder chamber, with two functional sectors.
  • the station can be the powder polishing device itself, comprising appropriate operating elements for adjusting the pressure and the rate of flow.
  • the station can also be connected with another device that has the above mentioned characteristics, such that the station as such substantially only serves to arrange and supply the powder chamber as such.
  • each connecting section comprises at least one projection/process designed to engage in appropriately configured functional sectors of the powder chamber.
  • the functional sectors are suitably provided with one or several appropriate recesses/depressions.
  • the concept can also be reversed, such that the functional sector is provided with the process/projection.
  • the station is provided with a jamming mechanism which is configured to move at least one of the connection sections, especially in the direction of the other functional sector, which can cause the powder chamber to be locked, particularly by bracing or jamming the two functional sectors to each other.
  • the jamming mechanism is a pneumatic system.
  • a mechanical system based on an electric motor with an appropriately designed transmission is provided according to the invention.
  • a mechanical lever system is provided according to the invention, which the user can operate manually. In that casing, the user moves a lever after inserting the powder chamber in the station and braces or jams the station manually.
  • the station comprises a carrier structure that comprises the connecting sections.
  • the carrier structure can be of substantially U shaped design or formed as a bow, whereby the two shorter "arms" surround the connecting sections and whereby the two arms are connected by a web which extends substantially along and beside the powder chamber. This allows very good accessibility to the powder chamber and facilitates its arrangement.
  • the carrier structure has sufficient stiffness to allow the locking of a powder chamber without the carrier structure being deformed.
  • the carrier structure is made of a firm plastic, but particularly of a metal such as aluminum or steel.
  • the carrier structure can also be built as a kind of framework or with appropriate bracing that provides the necessary stiffness.
  • the powder chamber is designed, for example, for an external force of about 5 to 800N which holds and locks the chamber in between respective connecting sections of the station.
  • This is the force or pressure needed to lock the powder chamber, i.e. especially a pressure applied on the outside.
  • Such force can be applied by e.g. activating a pneumatic device at one of the connecting sections, opposite of one or both of the functional sectors, e.g. underneath the lower connecting section, with a pressure of 1 to 5.5 bar.
  • Such pressure is designed to be higher than the internal pressure (static pressure) of the chamber so as to avoid that the closure element is removed and/or powder will spill out.
  • the powder chamber is also pressurized itself (i.e. inside), whereby one can distinguish between static pressure and working pressure.
  • Working pressure is the pressure in the powder chamber when medium/powder leaves the nozzle
  • static pressure is the pressure in the powder chamber when no medium/powder leaves, but the powder chamber is under pressure.
  • the working pressure is usually lower than the static pressure.
  • Typical values for the static pressure are in the range of about 2 to 5 bar, preferably between about 2,5 and 4.5 bar.
  • Values for the working pressure are in the range of about 1.5 to 3.5 bar, preferably in a range between about 1.7 and 3.2 bar.
  • the pressure in the powder chamber is increased first, for example, to about 2 bar, and then after a certain waiting period in which the pressure in the powder chamber has stabilized, it is increased to the desired target reading.
  • an insert/powder container is arranged or inserted in the powder chamber.
  • the pressure in the powder chamber influences its arrangement since the pressure also affects the insert. If the pressure in the powder chamber is increased suddenly, the insert can be jammed relative to the powder chamber.
  • a stepwise or ramp-shaped increase of the static pressure can advantageously counteract that.
  • At least one of the connecting sections is prestressed in a suitable way, via a spring mechanism according to the present invention which very simply allows the powder chamber to be prestressed. In that casing, the powder chamber is jammed directly upon insertion, not requiring any further steps.
  • the connecting sections are also designed or arranged against each other such that the powder chamber initially stands “freely” as long as it has not yet been locked.
  • connection sections to the openings of the functional sectors are provided with congruently designed inlets/outlets.
  • the lower connecting section for example, which is designed congruently to the first functional sector of the powder chamber, is provided with a corresponding connection or inlet for supplying the powder chamber with air/compressed air.
  • the upper connection section which suitably is designed congruently to the second functional sector of the powder chamber, is provided with a corresponding outlet for a mixture of powder and compressed air.
  • both connecting sections are substantially round, in particular circular and dimensioned such that they at least slightly protrude the diameter of the corresponding functional sectors, allowing a very even pressure or force application from the connection sections to the functional sectors.
  • the station has a magnetic section or a magnet according to the invention which interacts with the said magnet or magnetic ring on the powder chamber. This automatically pulls the powder chamber into the right position when it is arranged in the station.
  • the station is provided with one or more positioning means, for example in the form of sockets or bolts, which can serve to position or align the powder chamber.
  • positioning means for example in the form of sockets or bolts, which can serve to position or align the powder chamber.
  • the station comprises an arranging aid designed to facilitate an arrangement of the powder chamber, whereby the arranging aid comprises the magnetic area and at least one positioning means.
  • a method for operating a powder polishing device comprises the following steps:
  • the method according to the invention or the powder chamber according to the invention and/or the station according to the invention allow the very safe operation of the powder chamber and in particular prevent a removal of the powder chamber from the station when the powder chamber is still under pressure.
  • the method is designed such that the powder chamber is only released from the station when the pressure has been released from the powder chamber.
  • the said jamming mechanism is designed such that it only “frees” the powder chamber after the pressure in the powder chamber was released.
  • the described form on the functional sectors/connection sectors prevents a user simply to "pull out” the powder chamber, in particular across the rotational axis.
  • the station is provided with a light unit or the like which indicates whether the system is under pressure.
  • Fig. 1 shows a powder chamber 10 comprising a casing 12.
  • the powder chamber 10, which is substantially of rotationally symmetrical design (see rotational axis R) comprises a first lower functional sector 20 and a second upper functional sector 40.
  • the upper functional sector 40 is formed by a closure element 41 which is arranged within an access 14 formed by an upwardly tapering section of casing 12.
  • Closure element 41 comprises an outlet 42 formed by two drill holes.
  • Closure element 41 also comprises a recess/depression 30 in whose area a seal 50, here in the form of an O ring, is provided. Closure element 41 is also sealed toward casing 12 via a sealing element 50.
  • the powder chamber 10 comprises the first functional sector 20 which in the embodiment shown here is plugged inside insert 18 which is screwed to casing 12 with a thread 54.
  • a seal 50 at the first functional sector 20 which is similarly designed at functional sector 40.
  • the first functional sector 20 designed as a bottom plate 21 comprises an inlet 22 for air, in particular compressed air, whereby a seal 50 is provided concentrically to inlet 22.
  • the bottom plate 21 is also provided with an appropriate recess/depression 30 which in particular serves to arrange powder chamber 10 in a correspondingly congruently designed station or a correspondingly congruently designed powder polishing device.
  • lateral surfaces 32 of recess/depression 30 can prevent that powder chamber 10 is pulled out, for example out of a station.
  • a circulating magnetic ring 15 is provided which is meant to facilitate the positioning of powder chamber 10 in a station or in a powder polishing device.
  • the first functional sector 20 has a diameter d20 while the second functional sector 40 has a diameter d40.
  • force application sectors or pressure surfaces 20' and 40' via which the force/pressure can be applied to brace or jam powder chamber 10.
  • the opening 42 is, according to one embodiment of the present invention, a central opening, parallel to the axis R, directed from one functional sector 20 to the other functional sector 40, wherein the mixture outlet 44 for a mixture of powder and air, facing the inside of the powder chamber 10, is arranged angled to such axis R, preferably perpendicular.
  • Such arrangement prevents that the powder/air mixture, exiting the venture nozzle, will impinge on such outlet 44, which leads to an uneven flow, but the powder/air mixture leaves the powder chamber through such mixture outlet 44 at a region where an even distribution of the mixture can be achieved, usually sideways spaced apart from the centre of the upper functional sector 40.
  • Fig. 2 shows an embodiment of a station 60 in which a powder chamber 10 is arranged.
  • the basic structure of this powder chamber 10 is the same as that known from Fig. 1 , and therefore no detailed description is necessary.
  • Station 60 comprises a lower connecting section 61 and an upper connecting section 62, which in the embodiments shown here are both provided with appropriate projections/processes 65. This allows an ideal interaction with the correspondingly designed first functional sector 20 or the correspondingly designed second functional sector 40.
  • the station is substantially U-shaped and can therefore surround the powder chamber in the fashion of a screw clamp.
  • a carrier structure which gives the station its appropriate strength/stiffness, is not shown here for the sake of simplicity.
  • Projections/processes 65 and the corresponding recesses/depressions 30 in functional sectors 20, 40, allow the positioning a well as locking or fastening of powder chamber 10 in the correct position.
  • the upper connecting section 62 comprises a corresponding outlet 67 of a mixture of powder and air, whereby the dotted arrow only indicates that station 60 may be provided with a corresponding connection or exit for removing the mixture of powder and air. As indicated here, this removal may be upward leading out of the device, but alternatively also within the device at any other place toward the outside.
  • a jamming mechanism designed to move the lower connecting section 61 and/or the upper connecting section 62 along a rotational axis R of powder chamber 10, is not shown here.
  • the dotted lines in the area of the lower connecting section 61 indicate that for instance the move can be toward the bottom, which would allow powder chamber 10 to be easily removed from station 60.
  • Fig. 3 shows a perspective view of an also substantially U-shaped station 60, whereby a lower connecting section 61 can be seen with a process 65.
  • a powder chamber can be such that it is inserted by its second (upper) functional sector into station 10 at a corresponding upper connection section (not shown here) and is then automatically pulled via a magnet 64 and with the help of a stud/peg 63 into the correct position on the lower connecting section 61, while the used does not have to watch for the exact positioning.
  • station 60 also comprises a light source 68 which can indicate, for example, that the powder chamber is under pressure. It can also be used to illuminate the interior of the powder chamber which is suitably transparent or at least partly transparent, and this allows, for example, to very accurately read a filling level.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Nozzles (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)

Claims (12)

  1. Dispositif de polissage à poudre, muni de deux portions de connexion (61, 62) sensiblement opposées, les portions de connexion (61, 62) étant conçues pour maintenir une chambre à poudre (10), ledit dispositif de polissage à poudre comprenant un mécanisme de blocage conçu pour déplacer l'une au moins des portions de connexion (61, 62) de telle sorte que la chambre à poudre (10) puisse être verrouillée,
    caractérisé en ce que le mécanisme de blocage comprend un mécanisme à ressort, un système pneumatique, un moteur électrique, un système à levier mécanique et/ou un aimant.
  2. Dispositif de polissage à poudre selon la revendication 1,
    comprenant une aide à l'agencement conçue pour faciliter un agencement d'une chambre à poudre (10).
  3. Dispositif de polissage à poudre selon la revendication 1,
    comportant une chambre à poudre présentant un boîtier (12) et deux secteurs fonctionnels (20, 40), les deux secteurs fonctionnels (20, 40) étant conçus pour permettre à la chambre à poudre (10) d'être verrouillée, caractérisé en ce que les deux secteurs fonctionnels (20, 40) sont agencés de manière à être opposés l'un à l'autre, et
    au moins un secteur fonctionnel (20, 40) est conçu pour fournir une ouverture (22, 42) pour un fluide de travail tel que de l'air ou un mélange de poudre et d'air, et
    l'un au moins des deux secteurs fonctionnels (20, 40) est conçu pour permettre à la chambre à poudre (10) d'être verrouillée par le mécanisme de blocage dudit dispositif de polissage à poudre,
    le secteur fonctionnel (20, 40) présentant une cavité (30) ou dépression, qui peut empêcher un déplacement latéral de la chambre à poudre (10), la cavité (30) ou dépression étant formée de telle sorte qu'une contrepartie congruente correspondante sur le dispositif de polissage à poudre s'engage dans ladite cavité (30) ou dépression.
  4. Dispositif de polissage à poudre selon la revendication 3, caractérisé en ce qu'un premier secteur fonctionnel (20) est une plaque de fond (21) qui est reliée par coopération de forme et de force, en particulier de manière amovible, audit boîtier (12).
  5. Dispositif de polissage à poudre selon l'une des revendications 3 ou 4, caractérisé en ce qu'un deuxième secteur fonctionnel (40) est conçu comme un élément de fermeture amovible (41) agencé par coopération de forme et de force sur ledit boîtier.
  6. Dispositif de polissage à poudre selon l'une des revendications 3 à 5, caractérisé en ce que le verrouillage fait que la chambre à poudre (10) soit étanche.
  7. Dispositif de polissage à poudre selon l'une des revendications 3 à 6, caractérisé en ce que le premier secteur fonctionnel (20) présente une ouverture (22) conçue comme une entrée (22) pour le fluide de travail, à savoir de l'air comprimé.
  8. Dispositif de polissage à poudre selon l'une des revendications 3 à 7, caractérisé en ce que le deuxième secteur fonctionnel présente une ouverture (42) conçue comme une sortie pour un fluide, en particulier de l'air ou un mélange de poudre et d'air.
  9. Dispositif de polissage à poudre selon la revendication 8,
    dans lequel l'ouverture (42) est une ouverture centrale, parallèle à l'axe (R) dirigé d'un secteur fonctionnel (20, 40) à l'autre secteur fonctionnel (20, 40), et
    une sortie de mélange, tournée vers l'intérieur de la chambre à poudre (10), est agencée de manière inclinée par rapport audit axe (R), de préférence perpendiculairement.
  10. Dispositif de polissage à poudre selon l'une des revendications 8 à 9, caractérisé en ce que la chambre à poudre (10) est conçue à symétrie de révolution, et
    les ouvertures (22, 42) des secteurs fonctionnels (20, 40) sont sensiblement sur l'axe de rotation (R).
  11. Dispositif de polissage à poudre selon l'une des revendications 3 à 10, caractérisé en ce qu'au moins un secteur fonctionnel (20, 40) est muni d'une cavité (30) qui est conçue pour empêcher le déplacement latéral de la chambre à poudre (10).
  12. Dispositif de polissage à poudre selon l'une des revendications 3 à 11, caractérisé en ce que la chambre à poudre (10) est au moins partiellement magnétique.
EP16154213.9A 2016-02-04 2016-02-04 Chambre à poudre, station pour une chambre à poudre et procédé pour faire fonctionner un dispositif de polissage de poudre Active EP3202364B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP16154213.9A EP3202364B1 (fr) 2016-02-04 2016-02-04 Chambre à poudre, station pour une chambre à poudre et procédé pour faire fonctionner un dispositif de polissage de poudre
US16/075,413 US11633258B2 (en) 2016-02-04 2017-02-03 Powder chamber and station for a powder chamber
ES17702393T ES2881923T3 (es) 2016-02-04 2017-02-03 Cámara de polvo y estación para una cámara de polvo
JP2018540868A JP6946310B2 (ja) 2016-02-04 2017-02-03 粉体チャンバ及び粉体チャンバのためのステーション
CN201780019348.7A CN108882972B (zh) 2016-02-04 2017-02-03 粉末室和用于粉末室的工作台
PCT/EP2017/052331 WO2017134195A1 (fr) 2016-02-04 2017-02-03 Chambre de poudre et station pour chambre de poudre
EP17702393.4A EP3410977B1 (fr) 2016-02-04 2017-02-03 Chambre à poudre, station pour une chambre à poudre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16154213.9A EP3202364B1 (fr) 2016-02-04 2016-02-04 Chambre à poudre, station pour une chambre à poudre et procédé pour faire fonctionner un dispositif de polissage de poudre

Publications (2)

Publication Number Publication Date
EP3202364A1 EP3202364A1 (fr) 2017-08-09
EP3202364B1 true EP3202364B1 (fr) 2022-08-10

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EP16154213.9A Active EP3202364B1 (fr) 2016-02-04 2016-02-04 Chambre à poudre, station pour une chambre à poudre et procédé pour faire fonctionner un dispositif de polissage de poudre
EP17702393.4A Active EP3410977B1 (fr) 2016-02-04 2017-02-03 Chambre à poudre, station pour une chambre à poudre

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EP17702393.4A Active EP3410977B1 (fr) 2016-02-04 2017-02-03 Chambre à poudre, station pour une chambre à poudre

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US (1) US11633258B2 (fr)
EP (2) EP3202364B1 (fr)
JP (1) JP6946310B2 (fr)
CN (1) CN108882972B (fr)
ES (1) ES2881923T3 (fr)
WO (1) WO2017134195A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016118081B4 (de) * 2016-09-26 2018-09-20 Ferton Holding S.A. Zahnreinigungssystem, Pulverbehälter sowie Einsatz für einen Pulverbehälter

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AT75053B (de) * 1914-06-05 1918-12-10 L Schuler Fa Elektromagnetische Aufspannvorrichtung.
US5199229A (en) * 1990-02-26 1993-04-06 Thera Patent Gmbh & Co., Kg Gesellschaft Fur Industrielle Schutzrechte Sand blasting device
DE9013344U1 (de) * 1990-09-21 1990-11-29 Stahlbau Gaertig GmbH, 4770 Soest Vorrichtung zum Spannen von Stahl-Gasflaschen zum Ventilwechsel o.dgl.
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Also Published As

Publication number Publication date
WO2017134195A1 (fr) 2017-08-10
EP3410977A1 (fr) 2018-12-12
US11633258B2 (en) 2023-04-25
EP3202364A1 (fr) 2017-08-09
JP2019509088A (ja) 2019-04-04
JP6946310B2 (ja) 2021-10-06
CN108882972A (zh) 2018-11-23
US20190038381A1 (en) 2019-02-07
ES2881923T3 (es) 2021-11-30
EP3410977B1 (fr) 2021-05-05
CN108882972B (zh) 2021-10-01

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